If ps is not a null pointer, the mbsinit function determines whether the pointed-to mbstate_t object describes the initial conversion state.
Although a zero-initialized mbstate_t always represents the initial conversion state, there may be other values of mbstate_t that also represent the initial conversion state.
[edit] Parameters ps - pointer to the mbstate_t object to examine [edit] Return valueâ0â if ps is not a null pointer and does not represent the initial conversion state, nonzero value otherwise.
#include <locale.h>
#include <string.h>
#include <stdio.h>
#include <wchar.h>
int main(void)
{
// allow mbrlen() to work with UTF-8 multibyte encoding
setlocale(LC_ALL, "en_US.utf8");
// UTF-8 narrow multibyte encoding
const char* str = u8"æ°´"; // or u8"\u6c34" or "\xe6\xb0\xb4"
static mbstate_t mb; // zero-initialize
(void)mbrlen(&str[0], 1, &mb);
if (!mbsinit(&mb)) {
printf("After processing the first 1 byte of %s,\n"
"the conversion state is not initial\n\n", str);
}
(void)mbrlen(&str[1], strlen(str), &mb);
if (mbsinit(&mb)) {
printf("After processing the remaining 2 bytes of %s,\n"
"the conversion state is initial conversion state\n", str);
}
}
Output:
After processing the first 1 byte of æ°´, the conversion state is not initial After processing the remaining 2 bytes of æ°´, the conversion state is initial conversion state[edit] References
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